Dental casting-machine.



. i. E. BURNS. DENTAL CASTING MACHINE, fwm'cmmu FILED Am L isms.

1. E. BURNS.

DENTAL CASTING MACHINE. APPLICATION EILEDAAPB. 7. 1916.

Patented July 10,j 191?.

2 SHEETSTSHEET 2.

TOEN E. BURNS, Oli FLUSHHEQ', NEW YORK.

DENTAL CASTllmeMiCHNE.

To all whom z'tmag/ concern.

Be it known that l, JOHN E. BURNS, a

citizen of the Unitedv States, and resident of Flushing, Vin the county of Queens and State of New York, have invented certain new and useful Improvements in Dental Casting-ll/Iaohines, of which the following is a specification.

. more fullyV described. in

of the base.

This invention'relates to dental casting' machines and consists of means for supporting a flask in which the mold is prepared for the casting and a cap adapted to be closed down thereon so that compressed air may be admitted to. the flask-and the castn ing cooled under compression, as will be the following spesilic'ation, set north. in the claim and illusfg trated4 in' the; accompanying drawings,

`wherein r Figurel .is a side elevation of the device. llig.v 2 is a similar view of a modified form.

Fig. 3 is a side elevation of the device constructed .for either means of operation and showing in dottedl lines its adaptability for being Worked by either hand or foot.

Fig. i isa' sectional view of the preferred lhe` object of Ithis invention? is to provide a meansfor subjecting a flask with a dental fili mold, such as e crown., a bridge or a plate, to the action of`-compressed air whiley the molten metal is in the process of cooling'and hardening,l and for this purpose the desk which is made of several parts, is placed in a frame as shown iii-several of the views and a cap secured on the upper end of the saine through which the air is admitted to the tiaslr. y

The cap i is carried at the lower endof a pipe l1 which is adapted to receive corn-'- pressed heated air from any desired source and the pipe vis alsofitted in an overhangin arm 12 oft' a frame lvsupported on a ta'le 9-and either permanently, as shown Specification oi' Letters Fatent.

Application mea april r, wie. Asemi no. seem.

plan view of a modied forno.l

lmeans of the link 35.

. Patenteduly 110, 121W.,

in Figs. l and 3, secured by the set screw Il or adapted to slide 1rertically as shown in When the pipe and cap are ri idly secured the flask is carried by a Inova le platform 15 having guides 1C playing through -perforations 16 and a central stem- 17, the guide rods passing through a plate 18 which is part of the frame, and the stein being connected by means ci' the link i9 with a hand lever 20. By dotted lines in Fi 3 is shown how either form of lever is a apted to be applied to the machine to bring the cap and flask together.

By this means the flash is moved to and from the cap and a gasket between the two as shown in Fig. 7, may secure an air tight fitting while the compressed air is admitted 4 by opening the cock 2l.

The flask; may be rectangular in shape or round 'as shown in Figs. 4 and 7 and in which ,instance the flask 22 is seated in a base 23 and hase cover 24 upon which the gasket 25 is'pl'aced and on this the cap 10 is forced. Within the flask is placed a ring 26 in which the two sections of the mold are formed, and leading from the lower end of the flask .is a nipple 27 adapted to allow the escape of air through the perforations 28 in the base 23. The bose has e cavity 29 in its lower side and outlets() for the escape of the air.

lin orde' to operate the cap and forceit down upon 'the flask a foot 4lever 3l, as shown in Fig. v2 may be used und the cap may carry on its upper side'a plate with arms 32 having depending rods also passing through the peri'olations lof when the .platform l5 is removed and united by a plate 34 and connected with the lever 31 by fis will be seen in Fig. eithei' form of lever or means for bringing the cap and iiaslc together may be used, the parts used in Fig. 1 dropping apart by Tavity While those'of Fig. 2 are separated y 'the springs 36.

. While a rectangular flask niay be used as in Figs. i and 2 and with a base 37 having perfor-'ations 38 as shown in Fig. 8, it is obvious that the round Flask shown'separately may b used in either Figs. l or 2.

lt is evident that the parts may be otherwise arranged and modified without departing from the essential features above described or from the scope of theappended claixn.

What I claim as new iS: f

In a dental casting machine, the combination with a table having perforatons, of a bats@ plate with" guide rods extending through the perfor-ations, a stem depending from the plate, a lever beneath the table, a

link connecting the lever and stem, .a flask 10 0n the base plate, and a cap at the end of a compressed air pipe and adapted to fit the top .of the flask.

Signed at New York, in the county of New York and State of New York, this QBd 15 day of March, A. D. 1916.

JOHN n. URNS 

